Hybrid Beamforming with Fixed Phase Shifters for Uplink Cell-Free Millimetre-Wave Massive MIMO System

Al Ayidh, A., Sambo, Y. , Ansari, S. and Imran, M. (2021) Hybrid Beamforming with Fixed Phase Shifters for Uplink Cell-Free Millimetre-Wave Massive MIMO System. In: 2021 Joint EuCNC & 6G Summit, Porto, Portugal, 08-11 Jun 2021, pp. 19-24. ISBN 9781665415262 (doi: 10.1109/EuCNC/6GSummit51104.2021.9482579)

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Several innovative ideas are being proposed by researchers to lay a foundation for future generations of wireless communications due to anticipated explosive demand for throughput, ultra-low latency, ultra-high reliability and ubiquitous coverage. However, these demands will consume huge amount of resources, especially for cell-free (CF) millimetre-wave (mm-Wave) massive multiple input multiple output systems (MIMO), which is the promising direction for the coming wireless generations. In this paper, we present hybrid beamforming scheme based on alternating minimization and a few number of fixed phase shifters to maximize energy efficiency in the uplink CF mmWave massive MIMO systems. Simulation results illustrate that our proposed scheme with much fewer fixed phase shifters, e.g., 10 phase shifters, achieves up to approximately 20% and 50% energy efficiency improvement compared to adaptive radio frequency (RF) chains activation/deactivation and antenna selection schemes.

Item Type:Conference Proceedings
Glasgow Author(s) Enlighten ID:Ansari, Dr Shuja and Al Ayidh, Abdulrahman and Imran, Professor Muhammad and Sambo, Dr Yusuf
Authors: Al Ayidh, A., Sambo, Y., Ansari, S., and Imran, M.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Published Online:28 July 2021
Copyright Holders:Copyright © 2021 IEEE
Publisher Policy:Reproduced in accordance with the publisher copyright policy
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